fix async keyword for python 3.7
In Python 3.7, async becomes a keyword, and therefore we need
to change variable async.
.
The passthru() previously had async and async_call, we just remove
the old parameter.
.
scciclient moved from async to do_async as parameter, so we use that.

remove ircm bios test file
This makes test discovery fail. At this point, I don't think we care much
running this test at build time (it's testing Fujitsu BIOS settings, which
is quite specific), and it doesn't feel like worse spending the time to
investigate this issue.